What are the accepted payment methods?

We accept 30% T/T deposit with 70% before shipping, as well as L/C, D/P, PayPal, and Western Union.

How are the products packaged?

Standard packaging is 20-25 kg per carton, 36-48 cartons per pallet. Custom packaging and logos on cartons are available.

Do you accept custom designs for boxes?

Yes, we accept customized designs for both products and boxes with a professional design team.

How can I verify your company legitimacy?

We are verified suppliers on Made-in-China and undergo a rigorous certification process to ensure legitimacy.

Can I visit your factory?

Yes, factory visits are welcome at any time. Please contact us in advance to arrange airport or train station transportation.

Hardened Structural Flat Washers F436, HDG Carbon Steel Round Washers

Name: Hardened Structural Flat Washers F436, HDG Carbon Steel Round Washers
Brand: Bolnut Fastener Co., Ltd
SKU: 2216827595

Jiangsu, ChinaBolnut Fastener Co., Ltd

US$0.10

1 Piece

Sample price:US$0.10/piece.Request sample

Product profile

Customization

Available

Type

Flat Gasket

Material

Stainless Steel/Carbon Steel

Model NO.

F436

Combination Washer Structure

A Type

Combination Washer Packaging

All Inclusive

Spring Washer Type

Standard

MOQ

10,000 PCS

Name

Hardened Structural Flat Washers

Certificate

ISO9001,RoHS

Finish

Black, Zinc, Plain, HDG

Transport Package

20-25kg/Carton+900kg Pallet

Specification

#1/4-#7/8

Trademark

BNT

Origin

China

HS Code

731815

Production Capacity

1000ton/Month

Key features

Diverse Material Options: Available in Stainless Steel (SS201, 303, 304, 316, 904L) and Carbon Steel.

Multiple Finish Choices: Zinc (Yellow, White, Blue, Black), Hot DIP Galvanized, Black Oxide, and more.

Custom Logo and Design: We accept custom logos on goods and customized packaging designs.

Free Sample Availability: Free samples provided for standard fasteners; express charges covered for existing customers.

Flexible Lead Time: 10-15 days in slack season, 15-30 days in busy season for customized orders.

Comprehensive Certifications: ISO9001 and RoHS certified for quality assurance and compliance.

Standard Compliance: Meets DIN, ASTM/ANSI, JIS, EN, ISO, AS, and GB standards.

Professional Manufacturing: Over 10 years experience with rigorous durability testing and CNC machining.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceYears of Export ExperienceFast Delivery

Bolnut Fastener Co., Ltd

Jiangsu, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 13 YearsNearest Port: SHANGHAI , NINGBO ,ZHAPU , SHENZHEN, TIANJINGAverage Response Time: ≤0.81h

AI-Powered supplier vetting

SummaryThe supplier is identified as a trading company in Zhangjiagang, Suzhou, with business scopes covering labor protection products, apparel, textiles, communication equipment, electronics, and certain medical protective products. It is described as a professional technical supplier and offers multiple customization modes, ODM services, and OEM services for popular brands. However, it has only one R&D engineer, launched no new products in the past year, and does not provide 3D software or SDK services. Service procedures and complaint-handling procedures exist, but supplier approval records are incomplete. Financial information is represented only by reporting years, without performance values. No overseas warehouse, showroom, overseas branch or offline trade-show participation is reported.

Supplier typeThe supplier is explicitly classified as a trade company, while its stated scope includes labor protection products, apparel, textiles, medical protective equipment, communication equipment, and electronic products. It is also identified as a professional technical supplier, indicating a trading-oriented business with technical and customization support rather than confirmed manufacturing status.

After-Sales capabilityThe supplier has a clear complaint-handling procedure with followed records, and it has a corrective and preventive action mechanism with implementation records. However, its general service-assessment procedure has no records, and its approved-supplier list lacks approval signatures or dates, indicating documented but incompletely controlled service processes.

R&D capabilityThe supplier is identified as a professional technical supplier and offers ODM services, but it has only one R&D engineer, launched no new products in the past year, and lacks both 3D software design and SDK capabilities. This shows some technical development and design support, but limited demonstrated innovation output and digital R&D capability.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, full customization, minor customization, and flexible customization. It also provides ODM services, directly evidencing broad customization and design-manufacturing support.

Client casesA repeat-buyer preference of 50%–80% is reported, and the supplier states that it provides OEM services for popular brands. These are positive customer-related indicators, but no named customers, specific projects, order examples, or independently verifiable case details are provided.